package gui.storageunit;

import gui.common.*;
import core.CoreFacade;

/**
 * Controller class for the add storage unit view.
 */
public class AddStorageUnitController extends Controller implements
		IAddStorageUnitController {
	
	private CoreFacade core;
	private boolean canAdd;
	private String nameToAdd;
	
	/**
	 * Constructor.
	 * 
	 * @param view Reference to add storage unit view
	 */
	public AddStorageUnitController(IView view) 
	{
		super(view);
		
		core = CoreFacade.getInstance();
		canAdd = false;
		construct();
	}

	//
	// Controller overrides
	//
	
	/**
	 * Returns a reference to the view for this controller.
	 * 
	 * {@pre None}
	 * 
	 * {@post Returns a reference to the view for this controller.}
	 */
	@Override
	protected IAddStorageUnitView getView() 
	{
		return (IAddStorageUnitView)super.getView();
	}

	/**
	 * Sets the enable/disable state of all components in the controller's view.
	 * A component should be enabled only if the user is currently
	 * allowed to interact with that component.
	 * 
	 * {@pre None}
	 * 
	 * {@post The enable/disable state of all components in the controller's view
	 * have been set appropriately.}
	 */
	@Override
	protected void enableComponents() 
	{
		getView().enableOK(canAdd);
	}

	/**
	 * Loads data into the controller's view.
	 * 
	 *  {@pre None}
	 *  
	 *  {@post The controller has loaded data into its view}
	 */
	@Override
	protected void loadValues() 
	{
		// will this need to do anything?
	}

	//
	// IAddStorageUnitController overrides
	//

	/**
	 * This method is called when any of the fields in the
	 * add storage unit view is changed by the user.
	 */
	@Override
	public void valuesChanged() 
	{
		nameToAdd = getView().getStorageUnitName();
		canAdd = core.canAddStorageUnit(nameToAdd);
		enableComponents();
	}
	
	/**
	 * This method is called when the user clicks the "OK"
	 * button in the add storage unit view.
	 */
	@Override
	public void addStorageUnit() 
	{
		try{
			core.addStorageUnit(nameToAdd);
		}
		catch(Exception e)
		{
			//What are we going to do with this?
		}
	}

}

